BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1993-07-01'
	and o_orderdate < cast(date '1993-07-01' + interval '3 month' as date)
	and exists (
		select
			*
		from
			lineitem
		where
			l_orderkey = o_orderkey
			and l_commitdate < l_receiptdate
	)
group by
	o_orderpriority
order by
	o_orderpriority;
                                                                                  QUERY PLAN                                                                                  
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Sort  (cost=1159836.07..1159836.08 rows=1 width=16) (actual time=9130.989..9130.990 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=2731339 read=326435 written=71
   ->  HashAggregate  (cost=1159836.05..1159836.06 rows=1 width=16) (actual time=9130.923..9130.925 rows=5 loops=1)
         Group Key: orders.o_orderpriority
         Buffers: shared hit=2731334 read=326435 written=71
         ->  Nested Loop Semi Join  (cost=12629.54..1159050.07 rows=157196 width=16) (actual time=268.701..8867.773 rows=526661 loops=1)
               Buffers: shared hit=2731334 read=326435 written=71
               ->  Bitmap Heap Scan on orders  (cost=12628.97..277405.71 rows=581516 width=20) (actual time=268.592..1855.188 rows=574332 loops=1)
                     Recheck Cond: ((o_orderdate >= '1993-07-01'::date) AND (o_orderdate < '1993-10-01'::date))
                     Heap Blocks: exact=230508
                     Buffers: shared hit=215790 read=16377 written=4
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12483.59 rows=581516 width=0) (actual time=194.653..194.653 rows=579880 loops=1)
                           Index Cond: ((o_orderdate >= '1993-07-01'::date) AND (o_orderdate < '1993-10-01'::date))
                           Buffers: shared hit=1102 read=557
               ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.56..4.56 rows=5 width=4) (actual time=0.011..0.011 rows=1 loops=574332)
                     Index Cond: (l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=2515544 read=310058 written=67
 Planning time: 2.490 ms
 Execution time: 9132.979 ms
(21 rows)

COMMIT;
COMMIT